Dire Horse Cost

[The Avatar of Death]

Long story short, I created an Avatar of Death character. Then I decided to go Revelations on the enemy

"I looked, and behold, an ashen horse; and he who sat on it had the name Death; and Hades was following with him. Authority was given to them over a fourth of the earth, to kill with sword and with famine and with pestilence and by the wild beasts of the earth. Rev 6:8"

Now the problem: an ashen horse able to hold my huge size (in 2 levels, long story) character... How much should it cost? Is there a magic item I can use to boost it's size when I get bigger?

It's not for combat, but mostly RP and there isn't a guide I know of that deals with templates on mount costs.

[blashimov]

Ok, so you need a gargantuan mount, specifically a horse? And you want to buy it as opposed to having it be an animal companion?

You could use a permanent animal growth item for 90,000 gold, or the cheaper
http://www.d20pfsrd.com/magic-items/wondrous-items/wondrous-items/c-d/dire- collar
for temporary enlargements.

The reason there's no guide is typically you can't buy a dire animal, with a few noted exceptions. If such a thing was just around, it would be harder to train and much rarer, probably several thousand gold pieces, and then you'd still need to make it bigger.

As an animal companion, there's a hunter archetype that lets you add evolutions ...